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Hallo, are there any other underground mines producing slate, clay, gypsum, fluorspar or other industrial minerals or building material ? Unfortunately these are all mines I know: Honister (slate, Lake District) Llechwedd (slate, Blaenau Ffestiniog) Aberllefenni (slate, Corris) Thomas ---------------------------------------------------------- http://people.freenet.de/thomaas.imgrund/index.htm